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Specialized - Cathode Ray ·CathodeRay

D7221GY

Single-beam electrostatic oscilloscope CRT with a seven-centimeter rectangular screen, single acceleration, and low-power heater cathode. Philips designed it for economical oscilloscopes and compact display equipment.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
12-pin all glass JEDEC B12-246
Socket code
B12F
Base pins
12
Nominal heater
6.3 V / 100 mA

Description

The D7-221GY is a single-beam electrostatic oscilloscope cathode-ray tube with a 7 cm rectangular screen, single acceleration, and low-power heater cathode for economical oscilloscopes and display equipment.

Socket description

All-glass CRT 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
12-pin all glass JEDEC B12-246
Socket code
B12F
Base pins
12
Nominal heater voltage
6.3 V
Nominal heater current
100 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

12-pin all glass JEDEC B12-246 - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Cathode Ray

X-ray radiationInterelectrode capacitances
Max plate voltage
2200 V
Rectifier max heater-cathode voltage
100 V

Published characteristics audited; remaining numerical data retained in parameter table.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1985 Valvo

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Schnellheizkatode D [1]

    7

    Schnellheizkatode D 7-222 GY

  • Schnellheizkatode D [2]

    -222

    Schnellheizkatode D 7-222 GY

  • Sparheizkatode D [1]

    7

    . Sparheizkatode D 7-221 GY

  • Sparheizkatode D [2]

    -221

    . Sparheizkatode D 7-221 GY

  • Beschleunigungsspannung UG2G4G5,(L) =

    1000 V

    Beschleunigungsspannung UG2G4G5,(L) = 1000 V

  • Nutzbare Ablenkfliche min [1]

    60

    Nutzbare Ablenkfliche min. 60 mm x 36 mm

  • Nutzbare Ablenkfliche min [2]

    36

    Nutzbare Ablenkfliche min. 60 mm x 36 mm

  • Spannung Uy =

    6.3 V

    Spannung Uy = 6,3V

  • Abweichung v on der Ablenklinearitdt [1]

    2

    Abweichung v on der Ablenklinearitdt: 2) max. 2 % vert.rv

  • Abweichung v on der Ablenklinearitdt [2]

    2

    Abweichung v on der Ablenklinearitdt: 2) max. 2 % vert.rv

  • dem Ablenkraster bei Ig2G4G5,(L) = [1]

    10

    dem Ablenkraster bei Ig2G4G5,(L) = 10 pA ca., 0,28 mm

  • dem Ablenkraster bei Ig2G4G5,(L) = [2]

    0.28

    dem Ablenkraster bei Ig2G4G5,(L) = 10 pA ca., 0,28 mm

  • Beschleunigungsspannung Ug2

    6465 V

    Beschleunigungsspannung Ug26465,

  • Fokussierspannung Ug3 max

    2200 V

    Fokussierspannung Ug3 max. 2200

  • Steuergitterspannung -Ug1 max

    200 V

    Steuergitterspannung -Ug1 max. 200

  • Gitter-Steuerspannung, Mittelw. iiber [1]

    1 V

    Gitter-Steuerspannung, Mittelw. iiber 1 ms U1 max. 20

  • Gitter-Steuerspannung, Mittelw. iiber [2]

    20 V

    Gitter-Steuerspannung, Mittelw. iiber 1 ms U1 max. 20

  • Steuergitter Ableitwiderstand Rg1 max

    1

    Steuergitter Ableitwiderstand Rg1 max. 1

  • Beschleunigungsspannung UG2

    646 V

    Beschleunigungsspannung UG2646G5,

  • Astigmatismus-Korrekturspannung [1]

    5 V

    Astigmatismus-Korrekturspannung 5) AUG26465,

  • Astigmatismus-Korrekturspannung [2]

    6465 V

    Astigmatismus-Korrekturspannung 5) AUG26465,

  • Fokussierspannung Uga

    100...180 V

    Fokussierspannung Uga 100...180

  • Gitter-Steuerspannung fir einen

    3 V

    Gitter-Steuerspannung fir einen 3

  • Strahlstrom IG2G4G5,(L) = [1]

    10 A

    Strahlstrom IG2G4G5,(L) = 10 pA ) Uy 10 \2

  • Strahlstrom IG2G4G5,(L) = [2]

    10 A

    Strahlstrom IG2G4G5,(L) = 10 pA ) Uy 10 \2

  • Strahlstrom IG2G4G5,(L) = [3]

    2 A

    Strahlstrom IG2G4G5,(L) = 10 pA ) Uy 10 \2

  • Widerstand RE

    250

    Widerstand RE 250 @

  • Der erforgerliche Korrekturspulenstrom ist s

    10 mA

    Der erforgerliche Korrekturspulenstrom ist s 10 mA bei einer erforderlichen

  • Spannung =

    2.5 V

    Spannung = 2,5 V.

  • gemessen bei [1]

    25

    gemessen bei 25 % und $ 75 % der nutzbaren Ablenkung

  • gemessen bei [2]

    75

    gemessen bei 25 % und $ 75 % der nutzbaren Ablenkung

  • tentiale der Ablenkplattenpaare auf Uxy = Uxz2 = [1]

    1000

    tentiale der Ablenkplattenpaare auf Uxy = Uxz2 = 1000 V und Uyj = 300 V,

  • tentiale der Ablenkplattenpaare auf Uxy = Uxz2 = [2]

    300

    tentiale der Ablenkplattenpaare auf Uxy = Uxz2 = 1000 V und Uyj = 300 V,

  • Uyg =

    700 A

    Uyg = 700 V gedndert. Der gesamte Strahlstrom trifft nunmehr auf Y2. Er

  • strom fiir das dargestellte Ablenkraster betrdgt nun

    10 A

    strom fiir das dargestellte Ablenkraster betrdgt nun 10 pA. Mit Ugg wird in

  • matismuskorrekturspannung AUG2G4G5,(L) =

    0 V

    matismuskorrekturspannung AUG2G4G5,(L) = 0).

Data set 02

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Accelerator voltage typical

    1000 V

    Published datasheet value

  • Accelerator voltage maximum

    - to 2200 V

    Published datasheet value

  • Focusing electrode voltage typical

    100 to 180 V

    Published datasheet value

  • Focusing electrode voltage maximum

    - to 2200 V

    Published datasheet value

  • Deflection linearity deviation maximum

    - to 2 %

    Published datasheet value

  • Rotation coil current maximum

    - to 10 mA

    Published datasheet value

  • Rotation coil voltage maximum

    - to 2.6 V

    Published datasheet value

  • Cathode-to-heater voltage positive maximum

    - to 100 V

    Published datasheet value

  • Cathode-to-heater voltage negative maximum

    - to 15 V

    Published datasheet value

Characteristics

  • Horizontal deflection coefficient

    12.5 V/cm

    Published datasheet value

  • Horizontal deflection coefficient maximum

    - to 13.8 V/cm

    Published datasheet value

  • Vertical deflection coefficient

    20 V/cm

    Published datasheet value

  • Vertical deflection coefficient maximum

    - to 22 V/cm

    Published datasheet value

  • Useful scan horizontal minimum

    60 to - mm

    Published datasheet value

  • Useful scan vertical minimum

    36 to - mm

    Published datasheet value

  • Line width

    0.28 mm

    Published datasheet value

  • X1 to all except X2 capacitance

    3 pF

    Published datasheet value

  • X2 to all except X1 capacitance

    3 pF

    Published datasheet value

  • Y1 to all except Y2 capacitance

    4 pF

    Published datasheet value

  • Y2 to all except Y1 capacitance

    4 pF

    Published datasheet value

  • X1-X2 capacitance

    1.5 pF

    Published datasheet value

  • Y1-Y2 capacitance

    1.8 pF

    Published datasheet value

  • Control grid capacitance

    5.5 pF

    Published datasheet value

  • Cathode capacitance

    3 pF

    Published datasheet value

  • Rotation coil turns

    1000 turns

    Published datasheet value

  • Screen phosphor

    GY (green)

    Published datasheet value

  • Screen persistence

    medium

    Published datasheet value